Abstract
1. In this report six different subtypes of succinea: succinea-1 (Figs. 2-10), succinea-2 (Figs. 11-16), succinea-3 (Figs. 17-19), succinea-4 (Figs. 20-25), succinea-5 (Figs. 26-31) and succinea-6 (Figs. 32-36) are dealt with. These subtypes can be distinguished from one another by the mode of appearance and disappearance of the individual spots, each subtype having the characteristic mode variation in this respect.
2. Each of these subtypes is due to a factor (p1=factor for succinea-1, p2=factor for succinea-2, p3=factor for succinea-3, etc.) belonging to the same allelomorphic series as conspicua (PC), gutta (PG), distincta (PD), transversifascia (PT), spectabilis (PS), rostrata (PR), axyridis (PA), forficula (PF) and aulica (PAu), and they behave as recessives to all these types.
3. The elytral color pigments are two kinds, black and red, and the presence of the former pigment shows simple dominance to the presence of the latter pigment. Generally, in the elytra of the offspring, only the parts which are red in both parents appear as red.
